64556344365546 has 64 divisors (see below), whose sum is σ = 141244111397376. Its totient is φ = 19507874299200.

The previous prime is 64556344365523. The next prime is 64556344365571.

It is a happy number.

64556344365546 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46504456 + ... + 47872508.

It is an arithmetic number, because the mean of its divisors is an integer number (2206939240584).

Almost surely, 2^{64556344365546} is an apocalyptic number.

64556344365546 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

64556344365546 is an abundant number, since it is smaller than the sum of its proper divisors (76687767031830).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64556344365546 is a wasteful number, since it uses less digits than its factorization.

64556344365546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370067.

The product of its digits is 1866240000, while the sum is 66.

The spelling of 64556344365546 in words is "sixty-four trillion, five hundred fifty-six billion, three hundred forty-four million, three hundred sixty-five thousand, five hundred forty-six".